An acre is a unit of land measurement used in the United States and other countries. One acre is equal to 43,560 square feet, or approximately 4,047 square meters. To give you a better idea of its size, an acre of land is roughly equivalent to the following:
An acre of land can vary in shape, but a common rectangular shape for an acre of land is approximately 208 feet by 209 feet or 66 feet by 660 feet. An acre can also be divided into smaller units of measurement, such as square yards, square feet, or hectares.